The wavelength of spectral line obtained in the spectrum of ion, when the transition takes place between two levels whose sum is 4 and difference is 2, is [2026]

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Solution

Q.
The wavelength of spectral line obtained in the spectrum of ${Li}^{2 +}$ ion, when the transition takes place between two levels whose sum is 4 and difference is 2, is [2026]

1 $2.28 \times 10^{- 7} cm$

2 $2.28 \times 10^{- 6} cm$

3 $1.14 \times 10^{- 6} cm$

4 $1.14 \times 10^{- 7} cm$

Ans.
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